Scientific Discoveries and Ancient Evidence

What is the current scientific theory about the origin of the object that caused the dinosaur extinction?

• A carbonaceous asteroid from the main asteroid belt.

• An iron and magnesium silicate asteroid from the Baptistina family.

• A carbonaceous comet from the edge of the solar system, redirected by Jupiter.

• A large meteor that spontaneously formed near Earth.

What is the significance of the 120,000-year-old wild ox bone with parallel incisions found in Israel?

• It proves that ancient humans were skilled hunters.

• It is the oldest known example of symbolic representation from the Middle East.

• It was used as a tool for cutting and scraping.

• It shows early evidence of written language.

What was unique about the hand and footprints discovered in the Tibetan Plateau, dating back over 169,000 years?

• They were made by early hominids who were much larger than previously thought.

• They were the first evidence of bipedal locomotion.

• They were intentionally made by children, representing the earliest known art on an immobile rock surface.

• They showed evidence of early agricultural practices.

What new function has been discovered for some "junk DNA" segments, specifically transposable elements (TEs)?

• They are responsible for repairing damaged DNA strands.

• They regulate the expression of genes critical for mammalian development.

• They act as a storage unit for unused genetic information.

• They protect the genome from viral infections.